science
Grade-5
Easy
Question
Match the following:
| a. Iron oxide | 1. Silver and copper |
| b. Sterling silver | 2. Rust |
| c. Steel | 3. Copper and tin |
| d. Bronze | 4. Iron and carbon |
- a-2, b-1, c-4, d-3
- a-3, b-4, c-1, d-2
- a-1, b-2, c-4, d-3
- a-4, b-2, c-3, d-1
Hint:
Alloys are made up of metals and different elements.
The correct answer is: a-2, b-1, c-4, d-3
- Rust is made when iron forms its oxide with air, iron oxide(FeO)
- Bronze is an alloy of iron and carbon, steel is made of copper and tin and silver sterling is made of silver and copper.
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A compound results from the chemical combination of
| A – Two or more atoms only |
| B – Two or more non-metals only |
| C – Two or more metals only |
| D – Two or more atoms and non-metals |
A compound results from the chemical combination of
| A – Two or more atoms only |
| B – Two or more non-metals only |
| C – Two or more metals only |
| D – Two or more atoms and non-metals |
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Direction
Choose the correct option from the sentences below.
Statement A: Rust is iron oxide, silver tarnish is silver sulfide, and copper tarnish is copper oxide.
Statement B: Corrosion is the gradual “eating away” of a metal.
Direction
Choose the correct option from the sentences below.
Statement A: Rust is iron oxide, silver tarnish is silver sulfide, and copper tarnish is copper oxide.
Statement B: Corrosion is the gradual “eating away” of a metal.
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Corrosion ________ metals.
Corrosion ________ metals.
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Jewelry and other objects made with these as pure metals would not be worn very well.
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What does malleable mean?
What does malleable mean?
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Complete the following analogy.
Plastics used for storing soft drinks: PET :: Plastic on which oil and water do not stick: _______
Plastics used for storing soft drinks: PET :: Plastic on which oil and water do not stick: _______
Complete the following analogy.
Plastics used for storing soft drinks: PET :: Plastic on which oil and water do not stick: _______
Plastics used for storing soft drinks: PET :: Plastic on which oil and water do not stick: _______
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Which of the following applications of plastics show(s) that plastics are bad conductors of electricity?
I. Chemicals are stored in plastic containers.
II. Umbrellas are made from plastics.
III. Electric wires have a plastic coating.
iv. Refrigerators have insulating wool of plastics
I. Chemicals are stored in plastic containers.
II. Umbrellas are made from plastics.
III. Electric wires have a plastic coating.
iv. Refrigerators have insulating wool of plastics
Which of the following applications of plastics show(s) that plastics are bad conductors of electricity?
I. Chemicals are stored in plastic containers.
II. Umbrellas are made from plastics.
III. Electric wires have a plastic coating.
iv. Refrigerators have insulating wool of plastics
I. Chemicals are stored in plastic containers.
II. Umbrellas are made from plastics.
III. Electric wires have a plastic coating.
iv. Refrigerators have insulating wool of plastics
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Which of the following options is correct for the following statements?
(i). Plastics are generally poor conductors of electricity.
(ii). Melamine is a special plastic on which oil and water do not stick.
(iii). Ropes made by Bakelite are used in cranes and elevators
(i). Plastics are generally poor conductors of electricity.
(ii). Melamine is a special plastic on which oil and water do not stick.
(iii). Ropes made by Bakelite are used in cranes and elevators
Which of the following options is correct for the following statements?
(i). Plastics are generally poor conductors of electricity.
(ii). Melamine is a special plastic on which oil and water do not stick.
(iii). Ropes made by Bakelite are used in cranes and elevators
(i). Plastics are generally poor conductors of electricity.
(ii). Melamine is a special plastic on which oil and water do not stick.
(iii). Ropes made by Bakelite are used in cranes and elevators
scienceGrade-5
